Here is a summary of responses I received related to "big time." Most people
said that positives were worse than negatives, e.g.,
(1) You were a jerk big time
(2)*You were a hero big time
Others noticed that "big time" can occur by itself as a response to a question,
whereas "major" and postposed adjectives like "galore" cannot.
(3) Was it hard? Yeah, big time.
(4) Were there balloons? *Yeah, galore/yeah, major.
Others noticed that positives were not totally out, as in:
(5) My photo students are into Macs big time.
(6) You won big time.
But something funny is clearly going on, since (7) seems to be much worse
than (6):
(7) ?You won the lottery big time.
The preposed big-time is much more common, and may be derived from prison slang.
the preposed version, as in "He's a big-time thief" seems to me to be
unambigous-
ly an adjective, while the postverbal "big time" appears, as one correspondent
pointed out, to be modifying the verb or VP instead of a possibly nonexistent
noun.
Thanks to Zvi Gilbert, Joe Giampapa, John Hughes, Eric Carvalhal Miller,
and Lisa Russell for their observations.
Susan Fischer

Certain of my British co-workers at Oxford seemed to use "ish" in
a way similar to the descriptions of "not" that have recently
appeared on this list. For example,
Is your algorithm working?
Yes, it's working. Ish.
[I.e., meaning that it is sort-of working.]
I'm working from memory and don't know how widespread this is. Odd
that it should happen with something that, unlike "not," isn't even
normally an independent word.
Margaret Fleck